A method for computed tomography, includes, in order to scan an object to
be examined with a conical beam originating from a focus and with a
matrix-like detector array for detecting the beam, the focus is moved,
relative to the object to be examined, on a focal path around a system
axis. A detector array supplies an output data corresponding to received
radiation. The output data is filtered, and the filtered output data is
backprojected three-dimensionally in order to produce at least one slice
of a layer of the, which has a layer thickness. The slice represents
absorption values obtained from the output data of a voxel belonging to
the layer for the radiation from the beam. Filtering is carried out at
least also in the direction of the tangent to the focal path belonging to
a respective focal position, and normalization is carried out for each
voxel considered.
